会员注册 | 登录 | 微信快捷登录 支付宝快捷登录 QQ登录 微博登录 | 帮助中心 人人文库renrendoc.com美如初恋!
站内搜索 百度文库

热门搜索: 直缝焊接机 矿井提升机 循环球式转向器图纸 机器人手爪发展史 管道机器人dwg 动平衡试验台设计

   首页 人人文库网 > 资源分类 > DOC文档下载

外文翻译--计算机与制造业.doc

  • 资源星级:
  • 资源大小:91.50KB   全文页数:20页
  • 资源格式: DOC        下载权限:注册会员/VIP会员
您还没有登陆,请先登录。登陆后即可下载此文档。
  合作网站登录: 微信快捷登录 支付宝快捷登录   QQ登录   微博登录
友情提示
2:本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3:本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

外文翻译--计算机与制造业.doc

附录2英语原文TheComputerandManufacturingComputerAidedDesignThecomputerisbringingmanufacturingintotheInformationAge.Thisnewtool,alongfamiliaroneinbusinessandmanagementoperations,ismovingintothefactory,anditsadventischangingmanufacturingascertainlyasthesteamenginechangedit100yearsago.Thebasicmetalworkingprocessesarenotlikelytochangefundamentally,buttheirorganizationandcontroldefinitelywill.INonerespect,manufacturingcouldbesaidtobecomingfullcircle.Thefirstmanufacturingcouldwasacottageindustrythedesignerwasalsothemanufacturer,conceivingandfabricatingproductsoneatatime.Eventually,theconceptoftheinterchangeabilityofpartswasdeveloped,productionwasseparatedintospecializedfunctions,andidenticalpartswereproducedthousandsatatime.Today,althoughthedesignerandmanufacturermaynotbecomeoneagain,thefunctionsarebeingdrawncloseinthemovementtowardanintegratedmanufacturingsystem,Itisperhapsironicthat,atatimewhenthemarketdemandahighdegreedofproductdiversification,thenecessityforincreasingproductivityandreducingcostsisdrivingmanufacturingtowardintegrationintoacoherentsystem,acontinuousprocessinwhichpartsdonotspendasmuchas95ofproductiontimebeingmovedaroundorwaitingtobeworkedon.Thecomputeristhekeytoeachofthesetwinrequirements.Itistheonlytoolthatcanprovidethequickreflexes,theflexibilityandspeed,tomeetadiversifiedmarket.Anditistheonlytoolthatenablesthedetailedanalysisandtheaccessibilityofaccuratedatanecessaryfortheintegrationofthemanufacturingsystem.Itmaywellbethat,inthefuture,thecomputermaybeessentialtoacompanyssurvival.Manyoftodaysbusinesseswillfadeawaytobereplacedbymoreproductivecombinations.Suchmoreproductivecombinationsaresuperquality,superproductivityplants.Thegoalistodesignandoperateaplantthatwouldproduce100satisfactorypartswithgoodproductivity.Asophisticated,competitiveworldisrequiringthatmanufacturingbegintosettleformore,tobecomeitselfsophisticated,Tomeetcompetition,forexample,acompanywillhavetomeetthesomewhatconflictingdemandsforgreaterproductdiversification,higherquality,improvedproductivity,andlowprices.Thecompanythatseekstomeetthesedemandswillneedasophisticatedtool,onethatwillallowittorespondquicklytocustomerneedswhilegettingthemostoutofitsmanufacturingresources.Thecomputeristhattool.Becomingasuperquality,superproductivityplantrequirestheintegrationofanextremelycomplexsystem.Thiscanbeaccomplishedonlywhenallelementsofmanufacturingdesign,fabricationandassembly,qualityassurance,management,materialshandlingarecomputerintegrated.Inproductdesign,forexample,interactivecomputeraideddesignCADsystemsallowthedrawingandanalysistaskstobeperformedinafractionofthetimepreviouslyrequiredandwithgreateraccuracy.Andprogramsforprototypetestingandevaluationfurtherspeedthedesignprocess.Inmanufacturingplanning,computeraidedprocessplanningpermitstheselection,fromthousandsofpossiblesequencesschedules,oftheoptimumprocess.Ontheshopfloor,distributedintelligenceintheformofmicroprocessorscontrolsmachines,runsautomatedloadingandunloadingequipment,andcollectsdataoncurrentshopconditions.Butsuchisolatedrevolutionsarenotenough.Whatisneededisatotallyautomatedsystem,linkedbycommonsoftwarefromfrontdoortoback.Thebenefitsrangethroughoutthesystem.Essentially,computerintegrationprovideswidelyandinstantaneouslyavailable,accurateinformation,improvingcommunicationbetweendepartments,permittingtightercontrol,andgenerallyenhancingtheoverallqualityandefficiencyoftheentiresystem.Improvedcommunicationcanmean,forexample,designsthataremoreproducible.TheNCprogrammerandthetooldesignerhaveachancetoinfluencetheproductdesigner,andviceversa.Engineeringchanges,thus,canbereduced,andthosethatarerequiredcanbehandledmoreefficiently.Notonlydoesthecomputerpermitthemtobespecifiedmorequickly,butitalsoalertssubsequentusersofthedatatothefactthatachangehasbeenmade.Theinstantaneousupdatingofproductioncontroldatapermitsbetterplanningandmore0effectivescheduling.Expensiveequipment,therefore,isusedmoreproductively,andpartsmovemoreefficientlythroughproduction,reducingworkinprocesscosts.Productquality,too,canbeimproved.Notonlyaremoreaccuratedesignsproduced,forexample,buttheuseofdesigndatabythequalityassurancedepartmenthelpseliminateerrorsduetomisunderstandings.Peopleareenabledtodotheirjobsbetter.Byeliminatingtediouscalculationsandpaperworknottomentiontimewastedsearchingforinformationthecomputernotonlyallowsworkerstobemoreproductivebutalsofreesthemtodowhatonlyhumanbeingscandothinkcreatively.Computerintegrationmayalsolurenewpeopleintomanufacturing.Peopleareattractedbecausetheywanttoworkinamodern,technologicallysophisticatedenvironment.Inmanufacturingengineering,CAD/CAMdecreasestooldesign.NCprogramming,andplanningtimeswhilespeedingtheresponserate,whichwilleventuallypermitinhousestafftoperformworkthatiscurrentlybeingcontractedout.AccordingtotheToolManufacturingEngineersHandbook,processplanningisthesystematicdeterminationofthemethodsbywhichaproductistobemanufacturedeconomicallyandcompetitively.Itessentiallyinvolvesselection,calculation,anddocumentation.Processes,machines,tools,andsequencesmustbeselected.Suchfactorsasfeeds,speeds,tolerances,dimensions,andcostsmustbecalculated.Finally,documentsintheformofsetupinstructions,workinstructions,illustratedprocesssheets,androutingsmustbeprepared.Processplanningisanintermediatestagebetweendesigningandmanufacturingtheproduct.ButhowwelldoesitbridgedesignandmanufacturingMostmanufacturingengineerswouldagreethat,iftendifferentplannerswereaskedtodevelopaprocessplanforthesamepart,theywouldprobablycomeupwithtendifferentplans.Obviously,alltheseplanscannotreflectthemostefficientmanufacturingmethods,and,infact,thereisnoguaranteethatanyoneofthemwillconstitutetheoptimummethodsformanufacturingthepart.Whatmaybeevenmoredisturbingisthataprocessplandevelopedforapartduringacurrentmanufacturingprogrammaybequitedifferentmanufacturingprogramanditmayneverbeusedagainforthesameorsimilarpartduringaprevioussimilarpart.Thatrepresentsalotofwastedeffortandproducesagreatmanyinconsistenciesinrouting,tooling,laborrequirements,costing,andpossiblyevenpurchaserequirements.Ofcourse,processplansshouldnotnecessarilyremainstatic.Aslotsizeschangeandnewtechnology,equipment,andprocessesbecomeavailable,themosteffectivewaytomanufactureaparticularpartalsochanges,andthosechangesshouldbereflectedincurrentprocessplansreleasedtotheshop.Aplannermustmanageandretrieveagreatdealofdataandmanydocuments,includingestablishedstandards,machineabilitydata,machinespecifications,toolinginventories,stockavailability,andexistingprocessplans.Thisisprimarilyaninformationhandlingjob,andthecomputerisanidealcompanion.Thereisanotheradvantagetousingcomputerstohelpwithprocessplanning.Becausethetaskinvolvesmanyinterrelatedactivities,determiningtheoptimumplanrequiresmanyiterations.Sincecomputerscanreadilyperformvastnumbersofcomparisons,manymorealternativeplanscanbeexploredthanwouldbepossiblemanually.Athirdadvantageintheuseofcomputeraidedprocessplanningisuniformity.Severalspecificbenefitscanbeexpectedfromtheadoptionofcomputeraidedprocessplanningtechniques●Reducedclericaleffortinpreparationofinstructions.●Fewercalculationerrorsduetohumanerror.●Feweroversightsinlogicorinstructionsbecauseofthepromptingcapabilityavailablewithinteractivecomputerprograms.●Immediateaccesstouptodateinformationfromacentraldatabase.●Consistentinformation,becauseeveryplanneraccessesthesamedatabase.●Fasterresponsetochangesrequestedbyengineeringofotheroperatingdepartments.●Automaticuseofthelatestrevisionofapartdrawing.●Moredetailed,moreuniformprocessplanstatementsproducedbywordprocessingtechniques.

注意事项

本文(外文翻译--计算机与制造业.doc)为本站会员(英文资料库)主动上传,人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知人人文库网([email protected]),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

copyright@ 2015-2017 人人文库网网站版权所有
苏ICP备12009002号-5